protected override Expression VisitMemberExpression(MemberExpression memberExpression)
{
var newExpression = VisitExpression(memberExpression.Expression);
if (newExpression != memberExpression.Expression)
{
if (newExpression.Type == typeof(ValueBuffer))
{
return(_queryModelVisitor.BindMemberToValueBuffer(memberExpression, newExpression)
?? memberExpression);
}
var member = memberExpression.Member;
var typeInfo = newExpression.Type.GetTypeInfo();
if (typeInfo.IsGenericType &&
typeInfo.GetGenericTypeDefinition() == typeof(IAsyncGrouping <,>))
{
member = typeInfo.GetDeclaredProperty("Key");
}
return(Expression.MakeMemberAccess(newExpression, member));
}
return(memberExpression);
}
private static Expression HandleValueFromOpenJson(
EntityQueryModelVisitor entityQueryModelVisitor,
ValueFromOpenJsonOperator valueFromOpenJsonOperator,
QueryModel queryModel)
{
var visitor = new MemberAccessBindingExpressionVisitor(entityQueryModelVisitor.QueryCompilationContext.QuerySourceMapping
, entityQueryModelVisitor
, false);
if (valueFromOpenJsonOperator.Json is MemberExpression me)
{
if (me.Expression is ParameterExpression pe)
{
var mapping = entityQueryModelVisitor.QueryCompilationContext.QuerySourceMapping;
if (mapping.ContainsMapping(queryModel.MainFromClause))
{
if (QuerySourceMappingLookup.GetValue(mapping) is IDictionary <IQuerySource, Expression> lookup)
{
var source = lookup.Keys.FirstOrDefault(s => s.ItemType == pe.Type && s.ItemName == pe.Name);
source = source ?? lookup.Keys.SingleOrDefault(s => s.ItemType == pe.Type);
if (source != null)
{
var exp = mapping.GetExpression(source);
if (exp != null)
{
if (exp.Type == typeof(ValueBuffer))
{
var entityType = entityQueryModelVisitor.QueryCompilationContext.Model.FindEntityType(pe.Type);
if (entityType != null)
{
var prop = entityType.FindProperty(me.Member as PropertyInfo);
if (prop != null)
{
var json = entityQueryModelVisitor.BindMemberToValueBuffer(me, exp);
return(Expression.Call(valueFromOpenJsonOperator.ParseInfo.ParsedExpression.Method
, valueFromOpenJsonOperator.ParseInfo.ParsedExpression.Arguments[0]
, json
, valueFromOpenJsonOperator.Path));
}
}
}
var meexp = Expression.MakeMemberAccess(exp, me.Member);
return(Expression.Call(valueFromOpenJsonOperator.ParseInfo.ParsedExpression.Method
, valueFromOpenJsonOperator.ParseInfo.ParsedExpression.Arguments[0]
, meexp
, valueFromOpenJsonOperator.Path));
}
}
}
}
}
}
return(entityQueryModelVisitor.Expression);
}
protected override Expression VisitMember(MemberExpression node)
{
var expression = node.Expression.RemoveConvert();
if ((expression != node.Expression) &&
!(expression is QuerySourceReferenceExpression))
{
expression = node.Expression;
}
var newExpression = Visit(expression);
if (newExpression != expression)
{
if (newExpression.Type == typeof(ValueBuffer))
{
return(_queryModelVisitor
.BindMemberToValueBuffer(node, newExpression)
?? node);
}
var member = node.Member;
var typeInfo = newExpression.Type.GetTypeInfo();
if (typeInfo.IsGenericType &&
((typeInfo.GetGenericTypeDefinition() == typeof(IGrouping <,>)) ||
(typeInfo.GetGenericTypeDefinition() == typeof(IAsyncGrouping <,>))))
{
member = typeInfo.GetDeclaredProperty("Key");
}
return(Expression.MakeMemberAccess(newExpression, member));
}
return(node);
}